I'm not sure if Redman's release will be better than this but I attempted fixing it myself.I got this from some L4D2 skinhttp://www.l4dmaps.com/details.php?file=13968So I guess credit to Splinks for porting it to L4D2 so I could move it to Gmod and stuph

This download looks like an addon. You need to extract the downloaded zip and put the addon folder in your Garry's Mod addons folder. You should end up with a directory structure similar to below: